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Amy Krouse Rosenthal, the children's book author who most recently made headlines for her heartbreaking essay seeking a new love for her husband as she slowly lost her battle with cancer, died Monday morning.

Her longtime literary agent confirmed the news to NBC, saying "everything Amy did was life and love affirming."

"She was such a bright light with a great sense of wonder. Amy loved her family. She loved words, ideas, connections. She taught us that life's seemingly small moments are not really small at all," said Amy Rennert. "Amy's final essay, written under the most difficult of circumstances, a love letter to her husband Jason, was the ultimate gift to him and also to the rest of us."

Author and friend John Green also tweeted about the news.

...which the world saw when her recent essay about her husband Jason went viral. From her wonderful memoir Textbook to her picture books...

“I have never been on Tinder, Bumble or eHarmony, but I’m going to create a general profile for Jason right here, based on my experience of coexisting in the same house with him for, like, 9,490 days,” she wrote. “First, the basics: He is 5-foot-10, 160 pounds, with salt-and-pepper hair and hazel eyes.”

She goes on to say that Jason is a “sharp dresser,” “uncannily handy,” a good cook, a music lover, a painter, a traveler and more.

Amy had always enjoyed connecting with strangers, loved ones say. In 2008, she united hundreds of strangers at the Bean in her hometown of Chicago for a gathering that served as part of the project she called “The Beckoning of Lovely.”

She created a film of all the participants joining to “make a bunch of stuff together,” as she told the crowd. Her project was described as “an interactive love letter to the universe… rooted in human connection,” years before her latest piece received similar accolades.

Her husband Jason, who Krouse Rosenthal described as “an easy man to fall in love with," issued a statement to NBC News as their journey neared its end.

“It is Amy’s gift with words that has drawn the universe in,” he said. “Unfortunately I do not have the same aptitude for the written word, but if I did, I can assure you that my tale would be about the most epic love story… ours.”

According to "Today," Amy was in hospice last week, surrounded by family members who asked for privacy during this difficult time.